Portable Electronic Product

1. A portable electronic device comprising: a housing having at least three rack mechanisms, each rack mechanism comprising: a shaft having a base that is rotatably connected to the housing and a hook at an end opposite the base; an elastic sheet elastically attached to the housing; and a support plate having a through hole in an end and a region proximate the through hole that includes a limit block; wherein the shaft penetrates the elastic sheet and the hook is hingeably connected to the through hole of the support plate and can be rotated between an open and a closed position; wherein the elastic sheet is configured to prevent the disconnection of the support plate and the hook of the shaft; and wherein the limit block is configured to limit an open angle of the support plate in the open position when the support plate is supporting the portable electronic device.

2. The portable electronic device according to claim 1 , wherein: the elastic sheet is moveable between an initial position and a depressed position by a depressing force; and the elastic sheet in the depressed position is closer to the base of the shaft than the elastic sheet in the initial position.

3. The portable electronic device according to claim 1 , wherein the elastic sheet comprises: a straight plate parallel to the housing; an inclined plate fixedly connected to the straight plate; and a hole in the straight plate for receiving the shaft; wherein the inclined plate inclines toward and is fixedly connected to the housing.

4. The portable electronic device according to claim 1 , wherein the support plate comprises: an arc-shaped plate having a first end and a second end; and a flat plate fixedly connected to the second end of the arc-shaped plate; wherein the through hole is a rectangular hole and is proximate the first end of the arc-shaped plate; and wherein the limit block is spherical and is disposed between the through hole and the second end of the arc-shaped plate.

5. The portable electronic device according to claim 4 , wherein the first end of the arc-shaped plate includes two arc-shaped bulges symmetrically arranged on each side of the through hole and have a bending radius equal to a bending radius of the arc-shaped plate.

6. The portable electronic device according to claim 5 , wherein: rotating the support plate around a hinge axis of the hingeable connection with the hook from the closed to the open position causes the arc-shaped bulges to depress the straight plate of the elastic sheet, moving the elastic sheet away from the hook of the shaft; and when the support plate is in the open position the limit block and arc-shaped bulges contact the straight plate, retaining the support plate in the open position.

7. The portable electronic device according to claim 6 , wherein when the support plate is in the closed position the flat plate fits together with a back surface of the housing and the arc-shaped plate and the elastic sheet enclose an opening.

8. The portable electronic device according to claim 1 , wherein: the rotary shaft comprises a column body; the base is a circular platform extending outwards from the column body; and the housing includes a mounting hole corresponding to the column body.

9. The portable electronic device according to claim 1 , wherein the hook of the shaft is arc-shaped.

10. The portable electronic device according to claim 8 , wherein the hook of the shaft is arc-shaped.